0 ~ 15 VOLT, 2 AMPERE, DIGITAL POWER SUPPLY

General :

• Expected price : USD 20 (Rp 200.000,-)
• Condition         : New
• Manufactured   : 2010 (China)

Personal review:

• Linier power supply (transformer based) means free from noise/frequency interference.
• Suitable for testing small electronic equipment such as VCO module, hand phone, handy transceiver, etc.  
• Adjustable Voltage output (fine adjustment with 0.1 Volt step is provided) with short circuit / over current protector.
• Load regulation (0.01 Volt) or less than 5%
• Ripple voltage 5 mVpp at 12 VDC, 1 Ampere.

10 Hz ~ 2400 MHz DESKTOP FREQUENCY COUNTER

General :

• Estimated price :  USD 45  (Rp. 450.000,-)
• Condition           : New
• Manufactured    : 2005 (China)

                                                                    Prescaler board

Personal review :

• 4 selectable ranges :  10 Hz ~ 50 MHz, 50 ~ 2400 MHz, Counter, Crystal Checker.
• 3 selectable Gate times : 0.1 mS, 1 mS, 10 Second.
• 13 MHz Output for calibration purpose
• Supplied from AC 220, 20 Watt
• High brightness 8 x Led display 7 segments
• Crystal time base with 30 ppm
• Display the Frequency, Gate time, Hold the reading.
• Medium sensitivity < 10 mV, able to detect frequency transmitter in radius less than 1 m (depending transmitter power)

GOOIT 50 MHz ~ 2400 MHz PORTABLE FREQUENCY COUNTER

General :

• Estimated price : USD 25
• Condition          : New
• Manufactured    : 2010 (China)

 

 Personal review :

• Frequency Range: 50Mhz to 2.4Ghz
• Distance covered: 8m for U-band and 5m for V-band
• External 9 VDC Battery required
• Display Frequency, RF signal and Auto switch off
• One button with all functions.
• Medium sensitivity < 5 mV, able to detect frequency transmitter in radius less than 5 m (depending transmitter power).

YAEGE FC-1, 10 Hz ~ 2600 MHz PORTABLE FREQUENCY COUNTER

General :

• Estimated price  : USD 50
• Condition            : New
• Manufactured     : 2010 (China)

Personal review :

• Two selectable range :  10 ~ 50 MHz, and 50 ~ 2600 MHz
• Built in rechargable Li-Ion Battery 1000 mAh.
• TCXO time base with 30 ppm
• Display the  RF signal, Gate time, Hold the reading, Saving function, and battery condition.
• Medium sensitivity < 5 mV, able to detect frequency transmitter in radius less than 5 m (depending transmitter power)

RGB TO NTSC / PAL CONVERTER + TV MODULATOR

General :

• Estimated price : USD 5 (Rp. 50.000,-)
• Condition : Sold as PS2 optional to accomodate PSone / PS2 with NTSC system to be PAL system.

Personal review :

• Simple circuit using single IC model Sony CXA1645.
• Converts RGB signal to PAL or NTSC video composite, Video Component and Television RF at VHF or UHF band.
• Audi/Video modulator transmit on VHF (181 ~ 230 MHz  or 540 ~ 690 MHz (3'rd harmonic).
• Hardware modification is required to modify from  PAL to  NTSC.

450 MHz 120 WATT LINIER SOLID STATE POWER AMPLIFIER

General :

• Estimated price : USD 150 (Rp. 1.500.000,-)
• Condition : Homebrew

 Personal review :

• Operating frequency : 440 ~ 450 MHz 
• Power input : 1 ~ 35 Watt
• 2 X Mitsubishi power transistor 2SC3102, produce Maximum Output 120 Watt with Power input 30 Watt (at 13.8 VDC 20 Ampere)
• Good VSWR input : 1.1 ~ 1.5
• Maximum output 150 Watt achieve with power input 50 Watt (not recommended !!!)

TOKYO HY POWER HL-500V, 500 WATT 144 MHz SOLID STATE POWER AMPLIFIER

General :

• Estimated price : USD 2300
• Condition          : New
• Manufactured   : 2008 (Japan)

 
Personal review :

• Too expensive ???
• Solid State FM, SSB, CW linier power amplifier utilize  2 x RF MOSFET Motorola MRF151G with maximum output 500 Watt (input 50 Watt)
• Built in Switching Power Supply with auto voltage 100 ~ 220 VAC
• Broad band design eliminate troublesome tuning operation as tube type amplifier.
• Equiped with various protection circuit such as over drive,  Antenna missmatch/VSWR, Over heating/Temperature, etc
• Analog meter indication indicate Forward/Reflected Power.

ALINCO DJ-X11 ALL MODE SCANNER RECEIVER 0.05 ~ 1300 MHz

Reference: http://www.alinco.com/

General :

• Estimated price : USD 400 (???)
• Manfactured : 2010

Features

• 2VFO simultaneous RX
• Main-band coverage: 0.05`1,299.99995MHz all mode AM/FM/WFM/SSB/CW (BFO for SSB/CW receive. An external antenna required for practical HF monitoring. Internal bar antenna for AM broadcast reception and earphone antenna feature inclusive.)
• Sub-band coverage: VHF:118`171MHz/UHF:336`470MHz in AM/NFM
• 1200 memory channels with adjustable memory banks using utility freeware (optional PC cable required)
• IQ signal and Discriminator output features: DJ-X11 has an IQ signal output that can be used with 3rd-party software to operate as a SDR. 10.7MHz IF discriminator signal can be used with other receiver-related software available on the net such as AIS-plotting.
• Voice-guidance system reads entering/entered frequency in English
• Easy-to-use twin dials
• Pocket size unit measures 61 (W) x 106 (H) x 38 (D) mm / 2.4 (W) x 4.17 (H) x 1.50 (D) in (without projections)
• Rigged Polycarbonate body with rubber protectors
• Selectable tuning steps: 0.05/0.1/1/5/6.25/8.33/9/10/12.5/15/20/25/30/50/100/125/150/200/500kHz/1MHz
• Various scan modes: Preset, programmed, memory, VFO and tone scan
• 3 selectable scan speeds (VFO: 25ch/s, 33ch/s, 100ch/s, Memory: 4.5ch/s, 8.3ch/s, 20ch/s)
• TSQ and DCS decode
• Wire remote-control using optional EDS-12
• Long-lasting 1800mAh Li-Ion battery pack provides nearly 15 hours of operation at full audio output in a single RX mode
• 1200 Alphanumeric (up to 16 characters) memory channels
• Additional 100 memory channels are available for each Dual-mode memory, Search-pass, Priority monitoring and Programmed Scanning pairs
• Large, brightly illuminated full dot-matrix LCD and keypads
• Dual channel-scope (Alinco's patented spectrum-analyzer alike feature)
• Frequency counter and flash tune
• "Bug detector" function searches for hidden transmitters
• Illuminated keypad for comfortable operation
• Standard Drop-in charger fully charges empty EBP-74 in 4 hours
• RF gain and attenuator for both main/sub VFOs
• Analog inversion-scramble decoder***

SPECIFICATIONS
• Receiver range: Main VFO 0.05 - 1299.99995 MHz in All available modes / Sub VFO 118 - 170.995MHz & 336 - 469.995MHz in AM/FM (Cellular frequencies 824.000 - 849.995MHz, 869.000 - 894.995MHz blocked on T models. EGR model receives Ham and Broadcast bands only. 225 - 335.995 MHz in AM/FM may be usable although out of specification and warranty)
• Mode: FM,WFM,AM,SSB(USB/LSB),CW(CU/CL)
• Antenna Impedance: 50 ohms (SMA)
• Supply voltage: DC 3.7V (EBP-74) / DC 4.5V (EDH-33) / DC 5.4V - 6.0V (external regulated source) negative ground
• Current consumption: approx.130mA Mono band / 180mA Dual band
• Temperature range: -10 to +60 dig C (+14 to +140 dig F)
• Frequency stability: -7 to +3ppm(-10 to +60 dig C)(+14 to +140 dig F)
• Dimension without projection: 61 (W) x 106 (H) x 38 (D) mm / 2.4 (W) x 4.17 (H) x 1.50 (D)
• Weight: Approx.235g / 8.29 oz (Ant.& EBP-74 inclusive)
• Receiver: Triple-conversion super heterodyne AM/SSB/CW/FM in Main VFO / Double-conversion super heterodyne AM/FM in Sub VFO and WFM in Main VFO
• Selectivity: SSB/CW -6dB: 2kHz or more -50dB : 7.5kHz or less, AM/FM -6dB : 12kHz or more -60dB : 35kHz or less, WFM -6dB : 180kHz }40kHz -20dB : 470kHz or less
• Sensitivity(typical value within the band: 10dB S/N:AM/SSB/CW , 12dBSINAD:FM/WFM):
Main-band: 0.050~0.531MHz (AM) 5dBu 0.531~1.62MHz (AM) 2dBu 1.62~76MHz (AM) -5dBu 1.62~76MHz (SSB,CW) -10dBu 1.62~76MHz (FM) -15dBu 76~108MHz (WFM) -3dBu 108~136MHz (AM) -6dBu 136~174MHz (FM) -14dBu 175~221.75MHz (WFM) -6dBu 221.8~336MHz (AM) 0dBu 336~475.75MHz (FM) -13dBu 475.75~770MHz (WFM) -13dBu 770~1260MHz (FM) -9dBu 1260~1300MHz (FM) -6dBu
Sub-band: 118~136MHz (AM) -3dBu 136~170MHz (FM) -14dBu 336~470MHz (FM) -14dBu *225~335.995 MHz in AM/FM may be usable although out of specification and warranty. Sensitivity is better closer to 336MHz. This band is closed at the default setting,
• Audio Output power: More than 100mW (8ohm)

TOKYO HY POWER HL-350VDX 350 WATT 144 MHz SOLID STATE POWER AMPLIFIER

General :

• Manufacture price : USD 800
• Condition              : New
• Manufactured        :  200x (Japan)

Personal review :

• 144 ~ 148 MHz linier amplifier (SSB, FM, CW) consist of 5 x MRF247 Power Transistors.
• 330 Watt maximum output power at 13.8 VDC, 50 Amp
• Manually selectable Input 10/25/50 Watt
• Manually selectable RX amplifier gain -20/+6/+15 dB
• Analog meter Indicator with RF Power Meter, VSWR meter, and Voltage Input meter.
• Heat-sink inside cabinet with additional DC fan
• Automatic protection from High VSWR, Hi Temperature.  

GS31B 1200 Watt VHF/UHF Power Triode Tube

Conclusion :

• Estimated price : USD 120
• The GS-31b triode fulfills generation and amplification functions in grounded-grid circuits in continuous wave operation in the decimetric and metric wavelength ranges. It is physically identical to the GS-1b, but with minor electrical differences.

GENERAL
Cathode: indirectly heated, dispenser, oxide-coated.
Envelope: metal-ceramic.
Cooling: forced air.
Height, mm, at most:	with heat sink: 147
	without heat sink: 134
Diameter, mm, at most:	with heat sink: 100.2
	without heat sink: 65
Mass, kg, at most:	with heat sink: 1.2
	without heat sink: 650

A - anode; C - grid; KP - cathode and heater; P - heater

ENVIRONMENTAL OPERATING CONDITIONS
Vibration loads:
frequency, Hz	5-2,000
acceleration, m/s²	98
Multiple loads with acceleration, m/s²	343
Single impacts with acceleration, m/s²	1,470
Linear loads with acceleration, m/s²	490
Ambient Conditions:
Temperature, °C	-60 to +70
Relative humidity at up to +40 °C, %	98

NOMINAL ELECTRICAL PARAMETERS
Heater voltage, V	12.6
Heater current, A	3.4
Mutual conductance (Va = 2KV, Ia = 250mA, change in Vg = 1V), mA/V, at least	22
Operating point (negative Vg with Va = 2KV, Ia = 250mA), V	9
input capacitance, pF	21.5
output capacitance, at most, pF	4.5
transfer capacitance, pF	0.12
Warm up time, s, at most	120
Output power, Va = 1.8KV, Ia = 500mA, wavelength 60 cm, W:	>360
Output power, Va = 1.7KV, Ia = 700mA, wavelength 30 cm, W:	>180
Designed Tube Life (hours)	>1000

ELECTRICAL PARAMETER LIMITS
Heater voltage, V	12-13.2
Heater current, A	3.1-3.7
Operating point (negative Vg with Va = 2KV, Ia = 250mA), V	6-12
input capacitance, pF	19-24
output capacitance, pF	3.8-5.2
Maximum CW Anode voltage (Va), KV:	3
Maximum Instantaneous value Anode voltage (Va), KV:	6
Instantaneous value Grid voltage (Vg), V	-400 to +120
Maximum CW Cathode current (Ic), A	1.4
Anode Dissipation, W:	1.0x103
Grid Dissipation, W:	22
Temperature at anode lead, °C	200
Temperature at cathode and grid leads, °C	120
Temperature at external ceramic parts, °C	250
Wavelength,cm	28-100

Averaged Characteristic Curves: Uf = 12.6V; _______ anode; _ _ _ _ grid-anode	Averaged Characteristic Curves: Uf= 12.6V; _______ anode; _ _ _ _ grid-anode
Averaged Characteristic Curves Showing Output Power and Efficiency versus Anode Current: Uf = 12.6V; L = 30cm; _______ output power (P); _ _ _ _ efficiency (n)	Averaged Characteristic Curves Showing Output Power and Efficiency versus Anode Current: Uf = 12.6V; L = 30cm; _______ output power (P); _ _ _ _ efficiency (n)

NOKIA N9500 COMMUNICATOR SERVICE REPAIR MANUAL

General :
Estimated price : USD 20 ( Rp 200,000,-)
Condition : Working but the plastic casing have several crack/damage.


Background:
Having an obsolete Nokia Communicator model N9500 with severe condition caused by incidentally felt from desk. even the machine still working perfectly but the plastic casing was crack.
Trying to investigate inside of phone based on schematic, I have found some of components are useful for RF hobbyist.


Herewith the pictures :




The detail of motherboard picture is :




Based on both this picture and the schematic, we can indentify some of useful component as follows:

• 19.5 dB DC ~ 2 GHz LNA module (model BGA428) - for Wide band Low Noise - Receiver Amplifier
• 2 Watt Power Amplifier module 900/1800/1900 MHz
• WLAN module - MAX2821
• WLAN 2.4 GHz 1 Watt Power Module - RF5117
• Blue tooth module
• Chip Crystal (32 kHz, 12, 22 MHz) - for PLL or microcontroller projects
• VCTCXO 26 MHz - for obtain high stability oscilator
• VCO Module 3296 ~ 3980 MHz
• Mixer Module
• Ferrite bead (100 MHz)
• Various value Chip Coil (1.5; 2.2; 3.3; 4.7; 5.6; 8.2; 10; 12; 18; 22; 27 nH etc)
• Various value Chip Capasitor (12 pF ~ 220 uF)
• Various value Chip Resistor 63 mW (10 ~ 300 KOhm)
• BP-5L High Capacity Lithium Ion Battery (1500 mAH, 3.7 Volt)
• TFT 640 x 200, 65K Color LCD and 128 x 128, 65K Color LCD - for microcontroller projects
• VGA Camera

Picture of Power Amplifier Module and LNA

2SC3102, MRF650, MRF658 - UHF RF Power Transistor Test Result based on Datasheet

2SC3102
Estimated price : USD 35
Manufacture : Mitsubishi
Frequency test : 520 MHz
Output Power : 60 Watt, V supply12.5 Volt, Input : 20 Watt
Typical Gain : 4.8 dB
Maximum Output : 85Watt on 15 Volt, Power Input 25 Watt - Not recommended
Maximum Supply : 17 Volt
Efficiency : 65%




MRF650
Estimated price : USD 35
Manufacture : Motorola
Frequency test : 512 MHz
Output Power : 50 Watt, V supply 12.5Volt, Input : 20 Watt
Typical Gain : 5.2 dB
Maximum Output : 80 Watt on 16 Volt, Power Input 17 Watt - Not recommended
Maximum Supply : 16.5 Volt
Efficiency : 60%



MRF658
Estimated price : USD 40
Manufacture : Motorola
Frequency test : 512 MHz
Output Power : 65 Watt, V supply 12.5Volt, Input : 20 Watt
Typical Gain : 4.15 dB
Maximum Output : 120 Watt on 16 Volt, Power Input 35 Watt - Not recommended
Maximum Supply : 16.5 Volt
Efficiency : 50%

YAESU VX-8R, VX-8DR & VX-8GR 50/144/220/430 MHZ TRANSCEIVER

General :

• Manufacture price :  
• Yaesu VX-8R  USD 399,95
• Yaesu VX-8DR USD 419,95 
• Yaesu VX-8GR (waiting FCC approval)

Personal review :

• VX-8R /VX-8RD
• Quad-band (50/144/220/430 MHz) Transceiver.
• Bluetooth for hands-free Operation with optional accessories. 
• Waterproof/Submersible IPX7 rated-3ft for 30 minutes
• Optional FGP-2 GPS and antenna unit, CT-136 Adapter or MH-74a7a external mic. for GPS/APRS® operation (VX-8RD)  

• VX-8GR
• 144/430 Dual Band Transceiver
• GPS unit included Built-in GPS Antenna which is based on a 12-channel receiver for GPS/APRS® operation.  
• Wide Band Receiver for 108-999 MHz, 
• IPX-5 Water jets. – A  lower cost V/U APRS® handheld.
• MINUS TX/RX on 50 MHz/6m
• MINUS TX/RX on 220 MHz
• MINUS RX on HF band
• MINUS Bluetooth
• MINUS SU-1 Barometer sensor
• MINUS WFM RX, thus can not receive FM/Television broadcast 
• No water immersion 

Additional Information :

The Yaesu VX-8DR and VX-8GR are an APRS® enhanced versions of the VX8R Series. VX-8GR a lower cost V/U APRS® handheld by the built-in Worldwide Standard AX.25 Data TNC (1200/9600 bps data B band only).

• Key additional features include:
  - Smart Beaconing™ Function. – The beacon timing is automatically adjusted
  - Station List memories has increased from 40 to 50.
  - The number of APRS® Message Memories has increased from 20 to 30.
  - DIGI-PATH route indication function.
  - 8 DIGI-PATH routing settings
  - GPS Compass Display -”Heading Up” or “North Up”
  - APRS® Symbol Icon pre-set function
  - Clearly displayed APRS® Beacon Messages
  - Selective Message received indicated by Flashing LED

YAESU FTM-350 144/430 MHz DUAL BAND TRANSCEIVER

General :

• Manufacture price : USD 650
• Manufactured : 2009 (Japan) 

Main board

Personal review :

• True dual band with big and bright display (dual display, dual receiver/transmitter)
• Full duplex with cross band capability.
• Superior receiver sensitivity with wide band receiver (108 ~ 999 MHz) Aircraft receiver (AM), FM stereo receiver.
• No inter modulation problem on VHF band.
• Flat power output 5, 15, 50 Watt both UHF (400 ~ 470 MHz) and VHF (136 ~ 174 MHz).
• 220 MHz capabilities (1 Watt power output).
• Mini spectrum analyzer / High speed Band scope - The band scope functionality on this rig is really good and works on both receivers at the same time.
• Built-in Barometric Pressure Sensor - The radio can monitor and display your altitude and pressure.
• Independent RF Gain, DCS, and Tone Squelch.
• GPS receiver (optional GPS card, antenna required)
• Blue tooth capabilities.
• Mic, manual book, box, support included.

SONY PSP Play Station Portable

Another effort to share know how related to Sony PSP 2000 hardware

Plastic casing was removed

LCD panel and Motherboard was removed

Motherboard

2SC2782, 2SC5125, SD1477, MRF 247 VHF RF Power Transistor Test Result based on Datasheet

2SC2782

• Estimated price : USD 30 
• Manufacture : Toshiba 
• Frequency test : 150 MHz 
• Output Power : 70 Watt, V supply12.5 Volt, Input : 10 Watt 
• Typical Gain : 6,7 dB 
• Maximum Output : 105 Watt on 14 Volt, Power Input 20 Watt - Not recommended 
• Maximum Supply : 16 Volt 
• Efficiency : 70%

2SC5125

• Estimated price : USD 35 
• Manufacture : Mitsubishi 
• Frequency test : 150 MHz 
• Output Power : 60 Watt, V supply12.5 Volt, Input : 10 Watt 
• Typical Gain : 7.2 dB 
• Maximum Output : 120 Watt on 16 Volt, Power Input 20 Watt - Not recommended 
• Maximum Supply : 17 Volt 
• Efficiency : 60%

SD1477

• Estimated price : USD 40 
• Manufacture : SGS Thomson Microelectronics
• Frequency test : 150 MHz 
• Output Power : 70 Watt, V supply12.5 Volt, Input : 10 Watt 
• Typical Gain : 6.0 dB 
• Maximum Output : 105 Watt on 12.5 Volt, Power Input 25 Watt - Not recommended 
• Maximum Supply : 18 Volt 
• Efficiency : -

MRF247

• Estimated price : USD 40 
• Manufacture : Motorola 
• Frequency test : 150 MHz 
• Output Power : 95Watt, V supply12.5 Volt, Input : 10 Watt 
• Typical Gain : 7.0 dB 
• Maximum Output : 120 Watt on 16 Volt, Power Input12 Watt - Not recommended 
• Maximum Supply : 18 Volt 
• Efficiency : 60%

KENWOOD PS-50 20 Ampere Heavy Duty Power Supply

General :

• Estimated price : Rp.800.000 (USD 80)
• Condition : All components are original as per manufacture specification

Personal Review :

• Power input : 120/220/240 VAC 10%,50/60 Hz
• Output current : 20A max. (Continuous operation for 1 hour. Includes external output terminal), 16A max, (External output terminal)
• Output Voltage : 13.8 VDC +/- 0,7V (At load current variation from 2 to 20A)
• Ripple voltage : Less than 20 mVrms (At 13,8 VDC, 20A)
• Power consumption :Approx. 500W +/- 10% (At 13.8 VDC, 20A)
• Feature included remotely switched on and off with the TS-440S power switch.
• Built in internal Fan instead of large heat sink as model PS-30
• Dimensions :W 173 (173) x H 95 (107) x D 296 (329) mm.
• Weight Approx. 7.2 kg